| Autor: |
X.J. Jiang, S.J. Bao, L.W. Zhang, X.Y. Zhang, L.S. Jiao, H.B. Qi, F. Wang |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Journal of Materials Research and Technology, Vol 24, Iss , Pp 8782-8792 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2023.05.137 |
| Popis: |
In this paper, the effect of Zr on the microstructure of laser additive manufactured Ti–6Al–4V (TC4) alloy is studied by adding different contents of Zr (0%, 15%, 30%, 45%), and the mechanisms of strengthening and corrosion passivation are also discussed. The results show that the stability of β phase increases with increasing Zr content, when Zr content reaches 45%, the β phase is completely retained to room temperature. The microstructure of TC4 can be refined by Zr (when the content of Zr is less than or equal to 30%), and the ultra-fine martensite with twinning substructure can be formed. With the increase of Zr content to 45%, the strength of the alloy increases from 1044 MPa to 1360 MPa. The elongation decreases from 10.8% to 7.7% with the increase of Zr content to 30%. However, as the content of Zr increases to 45%, the elongation increases to 12.5%. The abnormal phenomenon of elongation is mainly due to the change of deformation mechanism from dislocation slip to stress-induced martensite transformation with the content of Zr increasing to 45%. The corrosion resistance of TC4-Zr alloys increases significantly with the increase of Zr content, which is mainly attributed to the better corrosion resistance of Zr and the better protection of ZrO2 formed in passivation film. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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